diff --git a/includes/BlockedDomainFilter.php b/includes/BlockedDomainFilter.php
index 4f3d8035b..368771ef3 100644
--- a/includes/BlockedDomainFilter.php
+++ b/includes/BlockedDomainFilter.php
@@ -59,7 +59,7 @@ class BlockedDomainFilter {
 	 * @param Title $title Title of the page that was attempted on, used for logging
 	 * @return Status Error status if it's a match, good status if not
 	 */
-	public function filter( VariableHolder $vars, $user, $title ) {
+	public function filter( VariableHolder $vars, User $user, Title $title ) {
 		global $wgAbuseFilterEnableBlockedExternalDomain;
 		$status = Status::newGood();
 		if ( !$wgAbuseFilterEnableBlockedExternalDomain ) {
@@ -122,7 +122,7 @@ class BlockedDomainFilter {
 	 * @param Title $title
 	 * @param string $blockedDomain The blocked domain the user attempted to add
 	 */
-	private function logFilterHit( User $user, $title, $blockedDomain ) {
+	private function logFilterHit( User $user, Title $title, string $blockedDomain ) {
 		$logEntry = new ManualLogEntry( 'abusefilterblockeddomainhit', 'hit' );
 		$logEntry->setPerformer( $user );
 		$logEntry->setTarget( $title );
diff --git a/includes/BlockedDomainStorage.php b/includes/BlockedDomainStorage.php
index 2933a9557..30bc82ebc 100644
--- a/includes/BlockedDomainStorage.php
+++ b/includes/BlockedDomainStorage.php
@@ -259,7 +259,7 @@ class BlockedDomainStorage implements IDBAccessObject {
 	 * @param string $comment Save comment
 	 * @return RevisionRecord|null
 	 */
-	private function saveContent( array $content, $user, $comment ): ?RevisionRecord {
+	private function saveContent( array $content, $user, string $comment ): ?RevisionRecord {
 		$configPage = $this->getBlockedDomainPage();
 		$page = $this->wikiPageFactory->newFromLinkTarget( $configPage );
 		$updater = $page->newPageUpdater( $user );
@@ -277,7 +277,7 @@ class BlockedDomainStorage implements IDBAccessObject {
 	/**
 	 * @return TitleValue TitleValue of the config json page
 	 */
-	private function getBlockedDomainPage() {
+	private function getBlockedDomainPage(): TitleValue {
 		return new TitleValue( NS_MEDIAWIKI, self::TARGET_PAGE );
 	}
 }